Granted Patent
Utility
US 5,627,859 · App. 08/273,661
Time-reversed infinite impulse response digital filtering
Inventor:
Michael Parr
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Jul 11, 1994
Inventor
Michael Parr
Assignee (at issue)
Huges Electronics
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.